/*******************************************************************************
* Copyright (c) 2016 Obeo.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Obeo - initial API and implementation
*******************************************************************************/
package org.eclipse.emf.compare.internal.conflict;
import static com.google.common.base.Predicates.and;
import static com.google.common.base.Predicates.instanceOf;
import static org.eclipse.emf.compare.ConflictKind.PSEUDO;
import static org.eclipse.emf.compare.ConflictKind.REAL;
import static org.eclipse.emf.compare.DifferenceKind.ADD;
import static org.eclipse.emf.compare.DifferenceKind.CHANGE;
import static org.eclipse.emf.compare.DifferenceKind.DELETE;
import static org.eclipse.emf.compare.DifferenceKind.MOVE;
import static org.eclipse.emf.compare.utils.EMFComparePredicates.ofKind;
import static org.eclipse.emf.compare.utils.EMFComparePredicates.onFeature;
import static org.eclipse.emf.compare.utils.EMFComparePredicates.possiblyConflictingWith;
import com.google.common.collect.Iterables;
import org.eclipse.emf.common.util.EList;
import org.eclipse.emf.common.util.Monitor;
import org.eclipse.emf.compare.Diff;
import org.eclipse.emf.compare.DifferenceKind;
import org.eclipse.emf.compare.ReferenceChange;
import org.eclipse.emf.ecore.EReference;
/**
* Search conflicts for non-containment {@link ReferenceChange}s.
*
* @author <a href="mailto:laurent.delaigue@obeo.fr">Laurent Delaigue</a>
*/
public class NonContainmentRefChangeConflictSearch {
/**
* Search conflicts for non-containment {@link ReferenceChange} of kind {@link DifferenceKind#ADD}.
*
* @author <a href="mailto:laurent.delaigue@obeo.fr">Laurent Delaigue</a>
*/
public static class Add extends AbstractConflictSearch<ReferenceChange> {
/**
* Constructor.
*
* @param diff
* The diff to search for conflicts
* @param index
* Comparison index, must not be null
* @param monitor
* the monitor to report progress to, must not be null
*/
public Add(ReferenceChange diff, ComparisonIndex index, Monitor monitor) {
super(diff, index, monitor);
}
@SuppressWarnings("unchecked")
@Override
public void detectConflicts() {
EReference feature = diff.getReference();
// Only unique features can conflict
if (feature.isUnique()) {
Object value = diff.getValue();
EList<Diff> diffsInSameMatch = diff.getMatch().getDifferences();
for (Diff candidate : Iterables.filter(diffsInSameMatch, and(possiblyConflictingWith(diff),
instanceOf(ReferenceChange.class), onFeature(feature), ofKind(ADD)))) {
Object candidateValue = ((ReferenceChange)candidate).getValue();
if (comparison.getEqualityHelper().matchingValues(value, candidateValue)) {
// This is a conflict. Is it real?
if (matchingIndices(diff.getMatch(), feature, value, candidateValue)) {
conflict(candidate, PSEUDO);
} else {
conflict(candidate, REAL);
}
}
}
}
}
}
/**
* Search conflicts for non-containment {@link ReferenceChange} of kind {@link DifferenceKind#CHANGE}.
*
* @author <a href="mailto:laurent.delaigue@obeo.fr">Laurent Delaigue</a>
*/
public static class Change extends AbstractConflictSearch<ReferenceChange> {
/**
* Constructor.
*
* @param diff
* The diff to search for conflicts
* @param index
* Comparison index, must not be null
* @param monitor
* the monitor to report progress to, must not be null
*/
public Change(ReferenceChange diff, ComparisonIndex index, Monitor monitor) {
super(diff, index, monitor);
}
@SuppressWarnings("unchecked")
@Override
public void detectConflicts() {
Object value = diff.getValue();
EReference feature = diff.getReference();
EList<Diff> diffsInSameMatch = diff.getMatch().getDifferences();
for (Diff candidate : Iterables.filter(diffsInSameMatch, and(possiblyConflictingWith(diff),
instanceOf(ReferenceChange.class), onFeature(feature), ofKind(CHANGE)))) {
Object candidateValue = ((ReferenceChange)candidate).getValue();
if (comparison.getEqualityHelper().matchingValues(value, candidateValue)) {
// Same value added on both side in the same container
conflict(candidate, PSEUDO);
} else if (!isFeatureMapChangeOrMergeableStringAttributeChange(diff, candidate)) {
conflict(candidate, REAL);
}
}
}
}
/**
* Search conflicts for non-containment {@link ReferenceChange} of kind {@link DifferenceKind#DELETE}.
*
* @author <a href="mailto:laurent.delaigue@obeo.fr">Laurent Delaigue</a>
*/
public static class Delete extends AbstractConflictSearch<ReferenceChange> {
/**
* Constructor.
*
* @param diff
* The diff to search for conflicts
* @param index
* Comparison index, must not be null
* @param monitor
* the monitor to report progress to, must not be null
*/
public Delete(ReferenceChange diff, ComparisonIndex index, Monitor monitor) {
super(diff, index, monitor);
}
@SuppressWarnings("unchecked")
@Override
public void detectConflicts() {
Object value = diff.getValue();
EReference feature = diff.getReference();
EList<Diff> diffsInSameMatch = diff.getMatch().getDifferences();
for (Diff candidate : Iterables.filter(diffsInSameMatch, and(possiblyConflictingWith(diff),
instanceOf(ReferenceChange.class), onFeature(feature), ofKind(MOVE, DELETE)))) {
Object candidateValue = ((ReferenceChange)candidate).getValue();
if (comparison.getEqualityHelper().matchingValues(value, candidateValue)) {
if (candidate.getKind() == MOVE) {
conflict(candidate, REAL);
} else if (diff.getMatch() == candidate.getMatch()) {
conflict(candidate, PSEUDO);
}
}
}
}
}
/**
* Search conflicts for non-containment {@link ReferenceChange} of kind {@link DifferenceKind#MOVE}.
*
* @author <a href="mailto:laurent.delaigue@obeo.fr">Laurent Delaigue</a>
*/
public static class Move extends AbstractConflictSearch<ReferenceChange> {
/**
* Constructor.
*
* @param diff
* The diff to search for conflicts
* @param index
* Comparison index, must not be null
* @param monitor
* the monitor to report progress to, must not be null
*/
public Move(ReferenceChange diff, ComparisonIndex index, Monitor monitor) {
super(diff, index, monitor);
}
@SuppressWarnings("unchecked")
@Override
public void detectConflicts() {
Object value = diff.getValue();
EReference feature = diff.getReference();
EList<Diff> diffsInSameMatch = diff.getMatch().getDifferences();
for (Diff candidate : Iterables.filter(diffsInSameMatch, and(possiblyConflictingWith(diff),
instanceOf(ReferenceChange.class), onFeature(feature), ofKind(MOVE)))) {
Object candidateValue = ((ReferenceChange)candidate).getValue();
if (matchingIndices(diff.getMatch(), feature, value, candidateValue)) {
conflict(candidate, PSEUDO);
} else {
conflict(candidate, REAL);
}
}
}
}
}
